CALEFFI. Inclined pressure reducing valves series 01024/17 GB. replaces 01024/14 GB

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Inclined pressure reducing valves 533 series RIT ISO 91 FM 15 LFFI /17 G replaces /1 G Function Pressure reducing valves are installed in

with nut 533 series Inclined pressure reducing valve with pressure gauge sizes 1/ and 3/ F 533 series Inclined pressure reducing valve with

Inclined pressure reducing valve with pressure gauge connection sizes Ø 15 and Ø for copper pipe 533 series Inclined pressure reducing valve

plated - 533/7/ series; dezincification resistant alloy N 115 WN, chrome plated over: PGF3 ontrol stem: dezincification resistant alloy N 11

1 Inclined pressure reducing valves 533 series RIT ISO 91 FM 15 LFFI /17 G replaces /1 G Function Pressure reducing valves are installed in residential water system to reduce and stabilise inlet pressure from the water network which is generally too high and variable for domestic systems to work properly. The 533. series was created for small systems, such as apartments, and to protect water storage heaters, where size and absence of noise are of particular concern. Product range 533 series Inclined pressure reducing valve sizes 1/ and 3/ F 5331 series Inclined pressure reducing valve size 3/ M x 3/ F with nut 533 series Inclined pressure reducing valve with pressure gauge sizes 1/ and 3/ F 533 series Inclined pressure reducing valve with pressure gauge connection sizes 1/ and 3/ F 533 series Inclined pressure reducing valve sizes Ø 15 and Ø for copper pipe 5337 series Inclined pressure reducing valve with pressure gauge connection sizes Ø 15 and Ø for copper pipe 533 series Inclined pressure reducing valve with pressure gauge sizes Ø 15 and Ø for copper pipe Technical specifications Materials ody: - 533/1// series; brass N 115 W17N, chrome plated - 533/7/ series; dezincification resistant alloy N 115 WN, chrome plated over: PGF3 ontrol stem: dezincification resistant alloy N 11 W7R artridge: POM Internal components: dezincification resistant alloy N 11 W7R iaphragm: PM Seals: PM Strainer: stainless steell N- (ISI 3) Performance Max. upstream pressure: 1 ownstream pressure setting range: 1 Factory setting: 3 Max. working temperature: Pressure gauge scale: Medium: water onnections Main connections: see product range Pressure gauge connection: 1/ F (ISO -1)

2 imensions Operating principle The functioning of the pressure reducing valve is based on the balance between two opposing forces: 1 the thrust of the spring to open the flow through the cross section. the thrust of the diaphragm to the close the flow through the cross section. ode /, /,1 UPSTRM OWNSTRM ode / 5,5, Operation with water flow When a draw-off outlet is opened on the water system, the force of the spring becomes greater than that of the diaphragm; the obturator moves downwards opening the valve to the flow of water. The greater the demand for water the lower the pressure under the diaphragm with a resulting greater flow of water through the valve. ode / / 7 ode Ø15 Ø Operation without water flow When the draw-off outlet is closed, the downstream pressure rises and pushes the diaphragm upwards. s a result the obturator closes the valve to the passage of water and maintains the pressure constant at the calibrated pressure. The slightest difference in favour of the force exercised by the diaphragm, in relation to that of the spring, causes the device to close. L F F I L F F I,51,5 L F F I L F F I 91,3 93, ode Ø 15 3, Ø 7,57

3 onstruction details ontoured diaphragm The membrane was designed with a special shape to give an accurate pressure regulation as a function of changes in the downstream pressure. This design feature also extends the valve life because the diaphragm is more resistant to pressure sudden changes and to wear. Silent operation The large chamber on the outlet side of the reducing valve creates a low flow speed zone. This is particularly effective in reducing noise generated by narrowing the width of the passage through which the water flows when the valve is reducing pressure. Small size The inclined design makes the 533. series reducers small in size so that they are easy to fit especially in domestic systems. Non-stick materials The central support ❶, which contains the moving parts, is made of a plastic material with a low coefficient of adhesion. This reduces the probability of scale deposits being formed, the main cause of malfunction. ❶ Use with boiler hydraulic safety groups xtractable cartridge The cartridges in the aleffi 533. series pressure reducing valves can be removed for periodic cleaning and maintenance. The 5331 model is specially designed for use with the aleffi hydraulic safety groups for hot water storage heaters 51 series. The 3/" nut provided can be used for an easy direct connection upstream of the hydraulic safety groups. RMOVL RTRIG RMOVL STRINR pprovals The pressure reducing valves are approved as compliant with WRS specifications in the United Kingdom and S in France.

4 Hydraulic characteristics The steps to take for selecting the correct size are as follows: The total flow rate is calculated from the number and type of appliances present by taking the sum of the individual flow rates. xample: One living unit with 1 bathroom 1 bidet G = l/min 1 shower G = 9 l/min 1 wash basin G = l/min 1 wc with cistern G = l/min 1 kitchen sink G = 1 l/min 1 washing machine G = 1 l/min G tot = 51 l/min No appliances = The design flow rate is calculated from the table of coefficients of simultaneity (using that for appliances). xample: G ds = G tot % = 51 1 % = 1 l/min It is recommended that flow velocity is kept within 1 to metres per second when calculating the correct reducing valve size. This will prevent noise in the pipes and rapid wear of appliances. The correct diameter of the reducing valve is taken from diagram 1 on the basis of the design flow rate taking into account an ideal flow velocity of between 1 and m/s (blue band). xample: Reference values: Sizing the valve Upstream pressure = ownstream pressure = The flow rates of commonly used appliances in domestic plumbing systems are given below to assist in the selection of the correct valve diameter: Table of typical flow rates athtub, kitchen sink, dishwasher 1 l/min Shower 9 l/min Washbasin, bidet, washing machine, W with cistern l/min The simultaneous-use factor must be taken into account to avoid selecting a valve that is too large. asically, the higher people quantity using the system, the lower the probability of two appliances being used at the same time. Table of simultaneous-use factor values (%) for G ds = 1 l/min select diameter 1/ (see indications on diagram 1) The pressure drop is taken from diagram, again on the basis of where the design flow rate intersects the curve for the relative diameter already selected (the downstream pressure falls by an amount equal to the pressure drop, with respect to the set pressure at no flow condition). xample: for G ds = 1 l/min 1/ p =, (see indications on diagram ) Recommended flow rates For an average flow velocity of 1,5 m/s, the recommended flow rates for each diameter are as follows: iameter 1/ Ø 15 3/ Ø Flow rate m 3 /h 1, 1,,1,1 Flow rate l/min Number Residential ommunity of appliances % % ,5,5,5 9,5 3,5 37 3,5 3 Number Residential ommunity of appliances % % , 1,5,5 19, Number Residential ommunity of appliances % % ,5 1 15, ,5 1,5,5 1,5 17,5 1,5 Sizing software is available on pple Store and Google play.

Installation 1. Turn all taps on before installing the valve to flush the system and expel any air remaining in the pipes.

The pressure reducing valve can be installed both on vertical and horizontal pipes. The upside-down installation is forbidden.. lose downstream shut-off valve. 5.

. djust until the correct pressure is read on the pressure gauge. The 533. Series reducing valve are factory set at 3.

5 Installation 1. Turn all taps on before installing the valve to flush the system and expel any air remaining in the pipes.. Install shut-off valves upstream and downstream of the pressure reducing valve to facilitate future maintenance operations. 3. The pressure reducing valve can be installed both on vertical and horizontal pipes. The upside-down installation is forbidden.. lose downstream shut-off valve. 5. Set the device by turning the spring locking nut under the bell cap with a mm hex key or flat-blade screwdriver clockwise to increase the setting or anticlockwise to reduce it.. djust until the correct pressure is read on the pressure gauge. The 533. Series reducing valve are factory set at 3. Recommendations for installation avitation diagram Upstream pressure (kpa) 1 1 High risk of cavitation Normal operating conditions Out of normal operating conditions 1. Installation below ground Installing pressure reducing valves below ground is not recommended, for four reasons: - there is a risk of the reducing valve being damaged by frost - inspection and maintenance is difficult - reading the pressure gauge is difficult - impurities may enter the device through the holes designed for the release of the volumetric compression present in the casing... Water hammer This is one of the main causes of demage in pressure reducing valves. It is best to fit special devices to absorb water hammer when installing pressure reducers in atrisk systems. Trouble-shooting ertain types of fault, which are generally due to faulty design of the system, are often wrongly attributed to pressure reducing valves. The most frequent cases are as follows: 1. Increased downstream pressure in the presence of a water heater This problem is due to heating of the water caused by the water heater. There is not relief of the pressure because the reducing valve is rightly closed. The solution is to install an expansion vessel (between the heater and the reducing valve) to absorb the pressure increase.. The reducing valve does not maintain its calibrated value In most cases this is the result of impurities that deposit on the valve seat causing leakage with a resulting increase in pressure downstream. The solution is to fit a strainer upstream of the reducer and subsequently to maintain and clean the extractable cartridge (see Maintenance). ownstream pressure (kpa) 1 Maintenance Proceed as follows for periodic cleaning of the strainer and inspection or replacement of the cartridge: In order to minimise the risk of cavitation in the reducing valve, which could cause malfunctions with the risk of erosion in the seal area, vibration and noise, you are strongly advised to refer to the operating conditions specified in the diagram. ue to numerous factors and variable conditions, such as: system pressure, temperature, presence of air, flow rate and speed, which could affect the performance of the pressure reducing valve; it is advisable to keep the ratio between upstream and downstream pressure ideally at :1 and no more than 3:1 (for example, upstream pressure, downstream pressure 5, pressure ratio = /5 = :1) In these conditions, the risk of cavitation is minimised, but this does not preclude the possible effects of the many other factors in play in the system during operation. If the pressure ratio exceeds the specified limit, you should consider the design pressure of the system or the use of a first stage pressure reducing valve (e.g. first stage pressure reducing valve from 1 to and second stage from to ). The upstream and downstream pipes of the pressure reducing valve must be secured with brackets in accordance with the manufacturer s instructions and local requirements, in order to avoid generating and transmitting noise and/or vibration in the installation. 1 Shut off the reducing valve Unscrew (anticlockwise) the calibrating screw to decompress the spring inside. 3 Unscrew the cover. xtract the cartridge with the aid of pliers on the hexagonal part. 5 The cartridge can be fitted back into the valve after inspection and cleaning or alternatively a replacement cartridge can be fitted. Recalibrate the reducing valve.

6 pplication diagrams SPIFITION SUMMRY 533 series Inclined pressure reducing valve. Threaded connections 1/ F (or 3/ F). rass body. hrome plated. ezincification resistant alloy stem. Glass/nylon cover. PM diaphragm and seals. Maximum working temperature. Maximum upstream pressure 1. ownstream pressure setting range from 1 to. xtractable cartridge and strainer for maintenance operations series Inclined pressure reducing valve. Threaded connection 3/ M x 3/ F with nut. rass body. hrome plated. ezincification resistant alloy stem. Glass/nylon cover. PM diaphragm and seals. Maximum working temperature. Maximum upstream pressure 1. ownstream pressure setting range from 1 to. xtractable cartridge and strainer for maintenance operations. 533 series Inclined pressure reducing valve with pressure gauge. Threaded connections 1/ F (or 3/ F). Pressure gauge connection 1/ F. rass body. hrome plated. ezincification resistant alloy stem. Glass/nylon cover. PM diaphragm and seals. Maximum working temperature. Maximum upstream pressure 1. ownstream pressure setting range from 1 to. xtractable cartridge and strainer for maintenance operations. omplete with pressure gauge, scale. 533 series Inclined pressure reducing valve with pressure gauge connection. Threaded connections 1/ F (or 3/ F). Pressure gauge connection 1/ F. rass body. hrome plated. ezincification resistant alloy stem. Glass/nylon cover. PM diaphragm and seals. Maximum working temperature. Maximum upstream pressure 1. ownstream pressure setting range from 1 to. xtractable cartridge and strainer for maintenance operations. 533 series Inclined pressure reducing valve. Ø 15 (or Ø ) connections. ezincification resistant alloy body and stem. hrome plated. Glass/nylon cover. PM diaphragm and seals. Maximum upstream temperature. Maximum working pressure 1. ownstream pressure setting range from 1 to. xtractable cartridge and strainer for maintenance operations series Inclined pressure reducing valve with pressure gauge connection. Ø 15 (or Ø ) connections. Pressure gauge connection 1/ F. ezincification resistant alloy body and stem. hrome plated. Glass/nylon cover. PM diaphragm and seals. Maximum working temperature. Maximum upstream pressure 1. ownstream pressure setting range from 1 to. xtractable cartridge and strainer for maintenance operations. 533 series Inclined pressure reducing valve with pressure gauge. Ø 15 (or Ø ) connections. Pressure gauge connection 1/ F. ezincification resistant alloy body and stem. hrome plated. Glass/nylon cover. PM diaphragm and seals. Maximum working temperature. Maximum upstream pressure 1. ownstream pressure setting range from 1 to. xtractable cartridge and strainer for maintenance operations. omplete with pressure gauge, scale. We reserve the right to make changes and improvements to the products and related data in this publication, at any time and without prior notice. aleffi S.p.. S.R. 9 n. 5 Fontaneto d gogna (NO) Italy Tel Fax info@caleffi.com opyright 17 aleffi

ACCREDITED H series Inclined pressure reducing valve sizes DN 15 (1/2 ) and DN 20 (3/4 )

ACCREDITED H series Inclined pressure reducing valve sizes DN 15 (1/2 ) and DN 20 (3/4 ) Inclined pressure reducing valves 533..H series RIT ISO 91 FM LFFI /17 G replaces / G Function Pressure reducing valves are installed in residential water systems to reduce and stabilise inlet pressure